Re: [PATCH -v2] x86/retpoline: Ensure default return thunk isn't used at runtime

[Borislav Petkov]

On Thu, Jan 04, 2024 at 02:24:46PM +0100, Borislav Petkov wrote:
> +void __warn_thunk(void)
> +{
> +	pr_warn_once("\n");
> +	pr_warn_once("**********************************************************\n");
> +	pr_warn_once("**   NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE NOTICE   **\n");
> +	pr_warn_once("**                                                      **\n");
> +	pr_warn_once("**   Unpatched return thunk in use. This should not     **\n");
> +	pr_warn_once("**   happen on a production kernel. Please report this  **\n");
> +	pr_warn_once("**   to x86@xxxxxxxxxx.                                 **\n");

I'm not yet sure here whether this should say "upstream kernels" because
otherwise we'll get a bunch of distro or whatnot downstream kernels
reports where we can't really do anything about...

Hmmm.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette